Portable motor wrench



May 15, 1928., 1,669,746

c. w. GALLOWAY PORTABLE MOTOR WRENCH Filed Oct. 1. 1926 4 Sheets-Sheet 1 0 INVENTOR.

ATTORNEY.

May 15, 1928.

1,669,746 (3. w. GALLOWAY PORTABLE MOTOR warmer:

Filed Oct. 1. 1925 4 sheets-Sheet 2 INVEN TOR.

WACQMw-w w ATTORNEY.

May 15, 1923. 1,669,746

C. W. GALLOWAY PORTABLE MOTOR WRENCH Filed Oct. 1. 1926 4 Sheets-Sheet 3 z INVZiVTOR. 6214 A TTORNEY.v

May 15, 1928. 6 1,669,746 c. w. GALLOWAY PORTABLE MOTOR WRENCH Filed Oct. 1. 1926 4 Sheets-Sheet 4 I I p 6 I K m LIHIIH mlllm INVENTOR.

A TTORNE Y.

Patented May 1 5, 1928.

teams UNITED STATES PATENT OFFICE.

CHARLES W. GALLOWAY, 0F BALTIMORE, MARYL AND.

PORTABLE MOTOR WRENCH.

Application filed October 1, 1926. Serial No. 138,983.

In the repair of trucks of freight and other railroad cars .one of the expensive items of repair is the removal of the column bolts and ournal box bolts of the true The nuts on these bolts, after the truck has been in uSe in all kinds of weather, are extremely diflicult to remove due to the fact that in many instances they are rusted on the bolts, and in some instances, prior .to my invention, the only way toremove these refractory nuts was by splitting the nuts by using a chisel and maul, or byburning with a torch. he destruction of these nuts is quite an item of expense in repairing a truck, to say nothing of the time incident to the removal of such refractory nuts.

The primary object" of my invention-is to provide a portable motor wrench and carriage, which may be operated by one man in the construction and repairs to railway car trucks using box and column bolts, the use of which wrench climinating the de struction of nuts.

My invention consists, broadly stated, of a portable motor wrench and carriage of such construction that it may be operated by one man, and a wrench portion placed into engagement with the nut to be removed, and, means to operate said wrench for the purpose of applying or removing a nut.

In the drawings:

Figure 1 is a top plan view of my improved portable wrench and carriage."

Figure 2 is a side elevation of the same.

Figure 3 is a view similar .to Figurec2 with the gear housing in section.

Figure 4 is a vertical sectional view through the wrench and immediate associate parts being in elevation.

Figure 5 is a top plan view of the wrench end of the device.

The reference numeral 1 designates the carriage frame of my improved portable wrench one end of which is mounted upon a crank axle 2 on which are journaled suitable wheels 3; Ahand lever 4 is fixedly mounted on the crank axle 2 at one side of the machine and is provided with the pawl 5 which is adapted to engage the segmental rack 6, secured to the frame of themachine, whereby'on operating the lever 4 the cariage frame 1 is elevated or lowered to the desired position, the pawl 5 by its engagement with thesegmental rack holding the carriage in its adjusted position. This ad justment of the carriage permits of placing the wrench in suitable position for removing nuts at varying heights from the support on which the carriage rests.

Supported from the carriage frame is a gear housin 7 in which the train of gears 8', 9, 10, 11, 15 and 13 are suitably mounted. 14 is a commercial motor which may be either electric or air driven, said motor having a driving shaft 15 provided with the socket in its lower end into which the stub shaft 16 is operatively secured; the stub shaft 16 forming a part of, or keyed to, the gear 8.

, A ball race member 17 is bolted within the gear 13 as clearly shown in Figure 4, said race member 17 having an annular flange 18 adapted to reston the annular flange 19 of the gear 13 and secured thereon by means of the bolts 20. This member 17 has a ball race ways 21 in which the balls "22 are mounted. A ball race member 23 is secured by means of bolts 24 to the gear housing 7, the ball race on said member 23 being in operative relation to the ball race ways 21 at the bottom of the member 17. A ball race way member 25 is secured by means of bolts 26 to the carriage frame 1, the race ways therein cooperating with the race ways in the upper end of theimember 17, as clearl shown in Figure 4. A lubricating port 27 is provided in the upper race way 25. The upper race way 25 is provided with an annular opening 28, which will be hereinafter referred to, said opening 28-having flaring walls th larger diameter of the opening being at the top. 2

The race member 17 is ring-like, and within the member 17 is mounteda rocking element, or tool socket 29, the tool socket being mounted upon the stub shafts 30, one end of the stub shafts being mounted in the race member 17 It will be notedthat the upper and lower outer wall portions of the tool socket 29 are beveled as at 31hereb permitting the rocking member 29 o roc within the race member 17 one rocking position being indicated in Figure 4. 32 are stub shafts secured in the rockingmember 29 by means of the set screws 33, the outer ends of which stub shafts project into a central'opening in the tdol socket, as shown in Figures 4 and 5.

The wrench head 34 is provided with a bi furcated stem 35, which stem is adapted to 'be seated in the rocking member 29, the

outer ends of the stub shafts 32 passing bechine is manipulated to position.

tween the bifurcated ends whereby the nut receiving member 34 is adapted to swing on the stub shaft 32 in a direction at right angles to the position shown in Figure 4, the space 36 (see Figure 5) permitting of such movement. These rocking movements of the wrench mounting enables the operator to adapt the machine to the nut that is to be removed irrespective of any unevenness of the surface on which the carriage is resting.

As above stated, the motor 14 may be any desired commercial air or electric motor of the reversible type. '37 and 38 are brace rods connected to the carriage and the motor respectively which are secured together by bolt or rivet 39 and then extended from that point to form a handle by which the ma- 40 is a control mechanism for stopping, starting and reversing the engine, said control mechanism having a beveled gear 41 which meshes with a similar gear 42 on the hand operated rod 43, said hand operated rod at its lower end being journalled in a bracket 44 secured to the handle member 38. The handle and the upper end of the rod 43 terminate at a suitable point in which they can be operated conveniently by the operator in a standing position. v

When it is desired toremove a nut the machine is placed in proper position relative to the car truck and the forward end,

carrying the wrench member 34, is tilteddownwardly and then shoved under the nut, until the wrench member 34 is in alignment with the nut whereupon the forward end of the machine is tilted upward until the nut is securely seated in the wrench 34. The operator then operates the rod 43 which through the beveled gears 41 and 42 operate the engine control 40 to put in movement the train of gears whereupon the wrench 34 is revolved either for the purpose of removing, or applying a nut to the bolt. After the nut is removed or applied the rod 43 is again operated to stop the engine. 7

By the use of my improved motor wrench it has been found from actual experience that two men with these machines can tighten up or remove nuts from the column bolts and journal box bolts of fifty trucks per day without destroying any of the nuts in their removal, whereas by the old method two men can remove only nuts per day, from which it will be seen that by the use of this machine there is a very material saving in labor, and a consequent reduction in cost in repairing trucks.

A suitable receptacle 45 may be secured to the platform of a carriage in which extra nuts, etc, may be placed.

By using the stub shafts 30 and 32 the opening through the wrench 34 and its stem 35 is clear from top to bottom into which the bolt may pass as the nut is being screwed tight.

What I claim is:

1. In a portable motor wrench, the combination with a carriage, a motor, and a nut wrench geared with said motor, said motor and wrench mounted on said carriage, and apair of traction wheels journalled to one end of said carriage and means for tilting the other end of said carriage with the wheels acting as fulcrums.

2. In a portable motor wrench, the combination with a carriage, a motor, and a nut wrench geared with said motor, said motor and wrench mounted on said carriage, and a pair of traction wheels journalled to one end of said carriage, and means for tilting the-other end of the carriage with the wheels acting as a fulcrum, and means mounted on the carriage to control the-starting, stopping and reverse of the motor.

3. In a portable motor wrench, substantially as described, the combination with the carriage and a nut wrench mounted on one end of the carriage, of a crank axle mounted atthe other end of the carriage, traction wheels journalled on said axle, and means to operate said crank axle to raise or lower the carriage relatively to the said wheels and means for rocking the carriage with the wheels functioning as a fulcrum.

4. In a portable motor nut wrench, substantially as described, the combination. with a carriage and a motor mounted thereon, of a train of gear operated by said motor, one of said gears having an inwardly extending annular flange, a bearing member having an outwardly extending annular flange adapted to be seated on and secured to the inwardly extending flange of said gear, a ball bearing between the carriage and said bearing member, a socket rockingly mounted in said bearing member and provided with a central opening therethrough, stub shafts projecting into said opening, and a nut wrench mounted in said opening on said stub shafts, said nut wrench being at one end of the carriage, a pair of wheels at the other end of the carriage, and means for moving the nut wrench end of the carriage up and down with the said wheels acting as a fulcrum.

In testimony whereof I afiix my signature.

CHARLES W. GALLOWAY. 

